Amperometric detection of alkali metal ions on micro-fabricated composite polymer membranes

Lee, Hye Jin; Beriet, C.; Girault, Hubert H.

doi:10.1016/s0022-0728(98)00171-5

Cited by 70 publications

(69 citation statements)

References 53 publications

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“…Inevitable reductions in diffusion coefficients of the analyte ions, associated with gellification of the organic phase, have not proven problematic when monitoring ion transfer by amperometric and voltammetric methods. Increases in uncompensated resistance in the cell due to gellification have been offset by incorporating micropore or microhole arrays into the experimental setup [11,19,22].…”

Section: Introductionmentioning

confidence: 99%

Flow-injection amperometry at microfabricated silicon-based μ-liquid–liquid interface arrays

Scanlon

Berduque

Strutwolf

et al. 2010

Electrochimica Acta

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Geometrically regular silicon membrane-based micropore arrays were employed for defined arrays of micrometer-sized interfaces between two immiscible electrolyte solutions (µITIES).These were incorporated into a poly(tetrafluoroethylene) (PTFE) hydrodynamic cell.Electrochemistry at the µITIES array was undertaken following gellification of the organic phase using polyvinyl chloride (PVC) and flowing an aqueous phase over the array surface.

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Section: Introductionmentioning

confidence: 99%

Flow-injection amperometry at microfabricated silicon-based μ-liquid–liquid interface arrays

Scanlon

Berduque

Strutwolf

et al. 2010

Electrochimica Acta

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“…Next, the formal transfer potential of each anion was determined from the corresponding experimental half-wave potential using the modified equation of inlaid micro-disc interface expressed by: ) is considered as 1/13.8 which is equal to the ratio between water and pure NPOE described previously. 10 Using the given information and the estimated half-wave potential of each anion from Figure 2, we were able to evaluate the formal transfer potential of all studied anions across the microhole array-water/3% PVC-NPOE gel using Eq. (3).…”

Section: Resultsmentioning

confidence: 99%

“…[10][11][12][13][14] The mechanical instability of immiscible liquid/liquid interface was also tackled by introducing a liquid/gel interface via the gelification of one of the phases utilizing polymers. 15 Such a micro-liquid/gel interface has successfully been implemented as an effective and sensitive detection platform of various cationic species, 10 heavy metals, 15 as well as enzymatic products.…”

Section: 11mentioning

confidence: 99%

Voltammetric Studies of Anion Transfer Reactions Across a Microhole Array-Water/PVC-NPOE Gel Interface

Hossain¹,

Lee

2012

Bulletin of the Korean Chemical Society

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Voltammetric characterization of hydrophilic anion transfer processes across a 66 microhole array interface between the water and polyvinylchloride-2-nitrophenyloctylether gel layer is demonstrated. Since the transfer of hydrophilic anions including Br − , NO 3− , SCN − and ClO 4 − across the liquid/gel interface usually sets the potential window within a negative potential region, a highly hydrophobic organic electrolyte, tetraoctylammonium tetrakis(pentafluorophenyl)borate, providing a wider potential window was incorporated into the gel phase. The transfer reaction of perchlorate anions across the microhole-water/gel interface was first studied using cyclic voltammetry and differential pulse voltammetry. The full voltammetric response of perchlorate anion transfer was then used as a reference for evaluating the half-wave transfer potentials, the formal transfer potentials and the formal Gibbs transfer energies of more hydrophilic anions such as Br− and SCN − . The current response associated with the perchlorate anion transfer across the micro-water/gel interface versus the perchlorate concentration was also demonstrated for sensing applications.

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“…Ag2SO4, bis(triphenylphosphoranylidene)ammonium chloride, and octyltriethoxysilane were supplied by Aldrich. BTPPATPBCl was prepared by the same method as reported elsewhere (41). Na 2SO4, K2SO4, MgSO4, NaOH, NaH2PO4, Na2HPO4, Hepes, D-glucose and DCE were obtained from Fisher.…”

Section: Methodsmentioning

confidence: 99%

The K _v channel blocker 4-aminopyridine enhances Ag ⁺ uptake: A scanning electrochemical microscopy study of single living cells

Zhan

Fan

Bard

2008

Proc. Natl. Acad. Sci. U.S.A.

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We report that silver ion (Ag ؉ ) uptake is enhanced by 4-aminopyridine (4-AP), a well known voltage-sensitive potassium ion channel (K v) blocker. Both bacterial (Escherichia coli) and mammalian (3T3 fibroblast) cells were used as model systems. Ag ؉ uptake was monitored with a scanning electrochemical microscope with an amperometric Ag ؉ ion-selective electrode (Ag ؉ -ISE) and the respiration rates of E. coli cells were measured by oxygen reduction at an ultramicroelectrode. The results showed that not only the amount but also the rate of silver uptake by the cells increased significantly when 4-AP was added to the solution. For fibroblasts, the Ag ؉ uptake rate was 4.8 ؋ E. coli ͉ scanning electrochemical microscope ͉ silver ion

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Amperometric detection of alkali metal ions on micro-fabricated composite polymer membranes

Cited by 70 publications

References 53 publications

Flow-injection amperometry at microfabricated silicon-based μ-liquid–liquid interface arrays

Flow-injection amperometry at microfabricated silicon-based μ-liquid–liquid interface arrays

Voltammetric Studies of Anion Transfer Reactions Across a Microhole Array-Water/PVC-NPOE Gel Interface

The K _v channel blocker 4-aminopyridine enhances Ag ⁺ uptake: A scanning electrochemical microscopy study of single living cells

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Amperometric detection of alkali metal ions on micro-fabricated composite polymer membranes

Cited by 70 publications

References 53 publications

Flow-injection amperometry at microfabricated silicon-based μ-liquid–liquid interface arrays

Flow-injection amperometry at microfabricated silicon-based μ-liquid–liquid interface arrays

Voltammetric Studies of Anion Transfer Reactions Across a Microhole Array-Water/PVC-NPOE Gel Interface

The K v channel blocker 4-aminopyridine enhances Ag + uptake: A scanning electrochemical microscopy study of single living cells

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The K _v channel blocker 4-aminopyridine enhances Ag ⁺ uptake: A scanning electrochemical microscopy study of single living cells